URL is insufficient for geowave raster configuration. Following PostGIS raster support a separate panel can be created that is more intuitive: [PG Raster sample code](https://github.com/geoserver/geoserver/blob/master/src/community/pgraster/src/main/java/org/geoserver/web/data/store/pgraster/PGRasterCoverageStoreEditPanel.java) [PG Raster documentation](http://docs.geoserver.org/latest/en/user/community/pgraster/pgraster.html)
URL is insufficient for geowave raster configuration. Following PostGIS raster support a separate panel can be created that is more intuitive:
PG Raster sample code
PG Raster documentation